Hole wall deformation sensor for large-diameter pressure relief drill hole

• Main Authors: WU YANLIANG, CUI BAOGE, LI CHANGQING, WANG CHONG, LI PENGYU, GAO JIUGUO, DING XIAO, YANG YANG, ZHANG WEI, REN WENTAO
• Format: Patent
• Language: Chinese; English
• Published: 23.08.2022
• Subjects: EARTH DRILLING; EARTH DRILLING, e.g. DEEP DRILLING; FIXED CONSTRUCTIONS; MINING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS

A hole wall deformation sensor for a large-diameter pressure relief drill hole comprises a deformation measuring base, the deformation measuring base is integrally in a split sleeve form, the interior of the sleeve has taper, the deformation measuring base is provided with a strain measuring rod, and the outer wall surface of the strain measuring rod is provided with a strain gauge; and a direction adjusting conical head is arranged in the strain measurement base in a threaded connection manner. The device is simple in structure, convenient to use, low in manufacturing cost and easy to maintain, solves various problems of pressure relief drill hole wall deformation measurement in the prior art through the simple structure, and realizes that the strain measuring rod probe can avoid coal cracks by rotating the deformation measurement base angle and expanding the deformation base, so that the pressure relief drill hole wall deformation measurement accuracy is improved. And contact with the relatively complete pa